Maybe an option to swap a default just for a testing run, then an offer after the test completes to keep the new default?
Trying to think of ways to make a lot of changes within or across Lindies quickly. Maybe a better example would be converting steps from 4o-mini to 5-mini or 5-nano.
Very likely to be similar cost along with an improved performance model.
I still think being able to set an account default that is different from Sonnet 4 might be a useful override for people who would prefer GPT or Gemini as their starting point.